Population
Service age groups
About this topic
Service age groups divide the population into broad life-stage bands such as children, young adults, working-age adults, and older people. The groupings are designed to reflect typical demand for age-based services and facilities rather than exact five-year cohorts.
This view is useful for planning childcare, schools, recreation, aged services, and other community infrastructure. It works best alongside five year age groups, household type, and dwelling data, which add more detail about who is living in an area and how needs may change over time.
Interpretation notes
- This is a derived grouping rather than a direct Census question, so the age bands are planning-oriented summaries built from standard age data.
- Percentages relate to the total population; use five year age groups when exact cohort detail matters.
Related topics
Key insight
In 2021, Parents and homebuilders (35 to 49) was the most common category among residents in Kogarah Bay, accounting for 17.5% (368 people). This share was lower than Georges River (A) (19.9%). Since 2016, the biggest change was in Empty nesters and retirees (60 to 69), which increased by 81 people and 3.6 percentage points.
Section overview
Age structure - Service age groups
Kogarah Bay - Total persons (Usual residence)
This table summarises service age groups for Kogarah Bay in 2021 for persons, with comparison against Georges River (A) and change since 2016.
Age structure - Service age groups snapshot
2021 distribution by category for Kogarah Bay, with comparison markers for Georges River (A).
Babies and pre-schoolers (0 to 4)
2021 count
76
% of total
3.6%
Change from 2016
-1.2pp
76
3.6%
-1.2pp
Primary schoolers (5 to 11)
2021 count
174
% of total
8.3%
Change from 2016
-1.8pp
174
8.3%
-1.8pp
Secondary schoolers (12 to 17)
2021 count
198
% of total
9.4%
Change from 2016
+2.1pp
198
9.4%
+2.1pp
Tertiary education and independence (18 to 24)
2021 count
201
% of total
9.6%
Change from 2016
-0.3pp
201
9.6%
-0.3pp
Young workforce (25 to 34)
2021 count
199
% of total
9.5%
Change from 2016
-1.1pp
199
9.5%
-1.1pp
Parents and homebuilders (35 to 49)
2021 count
368
% of total
17.5%
Change from 2016
-3.1pp
368
17.5%
-3.1pp
Older workers and pre-retirees (50 to 59)
2021 count
345
% of total
16.4%
Change from 2016
+0.6pp
345
16.4%
+0.6pp
Empty nesters and retirees (60 to 69)
2021 count
266
% of total
12.7%
Change from 2016
+3.6pp
266
12.7%
+3.6pp
Seniors (70 to 84)
2021 count
228
% of total
10.8%
Change from 2016
+1.6pp
228
10.8%
+1.6pp
Elderly aged (85 and over)
2021 count
60
% of total
2.9%
Change from 2016
+0.2pp
60
2.9%
+0.2pp
Chart view
Age structure - Service age groups change
Absolute change in category counts between 2016 and 2021.
Babies and pre-schoolers (0 to 4)
-22
-1.2pp
Primary schoolers (5 to 11)
-30
-1.8pp
Secondary schoolers (12 to 17)
+50
+2.1pp
Tertiary education and independence (18 to 24)
0
-0.3pp
Young workforce (25 to 34)
-15
-1.1pp
Parents and homebuilders (35 to 49)
-49
-3.1pp
Older workers and pre-retirees (50 to 59)
+25
+0.6pp
Empty nesters and retirees (60 to 69)
+81
+3.6pp
Seniors (70 to 84)
+42
+1.6pp
Elderly aged (85 and over)
+6
+0.2pp
Data table
Service age groups for Kogarah Bay. Age structure - Service age groups. 2021 and 2016 counts, percentages, and change compared with Georges River (A).
| Category | 2021 | 2016 | Change | |||||
|---|---|---|---|---|---|---|---|---|
| Count | % | Georges River (A)% | Count | % | Georges River (A)% | Count | pp | |
| Babies and pre-schoolers (0 to 4) | 76 | 3.6% | 5.0% | 98 | 4.8% | 5.8% | -22 | -1.2pp |
| Primary schoolers (5 to 11) | 174 | 8.3% | 7.7% | 204 | 10.1% | 7.7% | -30 | -1.8pp |
| Secondary schoolers (12 to 17) | 198 | 9.4% | 6.3% | 148 | 7.3% | 6.6% | +50 | +2.1pp |
| Tertiary education and independence (18 to 24) | 201 | 9.6% | 9.8% | 201 | 9.9% | 10.2% | 0 | -0.3pp |
| Young workforce (25 to 34) | 199 | 9.5% | 15.5% | 214 | 10.6% | 16.6% | -15 | -1.1pp |
| Parents and homebuilders (35 to 49) | 368 | 17.5% | 19.9% | 417 | 20.6% | 19.6% | -49 | -3.1pp |
| Older workers and pre-retirees (50 to 59) | 345 | 16.4% | 12.6% | 320 | 15.8% | 12.8% | +25 | +0.6pp |
| Empty nesters and retirees (60 to 69) | 266 | 12.7% | 10.8% | 185 | 9.1% | 9.7% | +81 | +3.6pp |
| Seniors (70 to 84) | 228 | 10.8% | 9.6% | 186 | 9.2% | 8.3% | +42 | +1.6pp |
| Elderly aged (85 and over) | 60 | 2.9% | 2.8% | 54 | 2.7% | 2.6% | +6 | +0.2pp |
| Total | 2,102 | 100.0% | 100.0% | 2,022 | 100.0% | 100.0% | +80 | 0.0pp |